import keyword
print(keyword.kwlist)

a = []
a.append(1)
a.append(3)
a.append(2)
print(a)
a[0] = 4
print(a)
# s = "zs"
# s+"ls"
# print(s)

t = tuple()
print(t)

t1 = set()
t1.add(1)
print(t1)